addChildAt

Adds an element to a layer by index. Note: the greater index is - the 'higher' element is in a layer top element overlaps bottom elements.
All DOM changes will happen instantly, except anychart.graphics.vector.Stage#suspend.
Left image shows sequential calls of anychart.graphics.vector.Layer#addChild
Right image does the same, but star is added to 0 index..addChildAt(star5, 0); (see code of this image in samples).

listen

A listener can only be added once to an object and if it is added again the key for the listener is
returned. Note that if the existing listener is a one-off listener (registered via listenOnce), it will no longer
be a one-off listener after a call to listen().

listenOnce

If an existing listener already exists, listenOnce will do nothing.
In particular, if the listener was previously registered via listen(), listenOnce() will not turn the listener into a
one-off listener. Similarly, if there is already an existing one-off listener, listenOnce does not modify
the listeners (it is still a once listener).

removeChildAt

Removes element from a layer by index.
All changes in DOM will happen instantly, except anychart.graphics.vector.Stage#suspend.Note: this method doesn't remove element, it just breaks the link between the element and the layer.

rotate

If rotation point is not set then rotation point is (0, 0).
Left illustration shows 20 degrees rotation with the default rotation point..rotate(20)
Right illustration shows 20 degrees rotation with the given rotation point..rotate(20, x, y)
Rotation points are marked with red, initial position of shapes is marked with gray.

rotateByAnchor

If anchor is not set anychart.graphics.vector.Anchor.CENTER is the default.
Left illustration shows 90 degrees rotation around the default anchor..rotateByAnchor(90)
Right illustration shows 90 degrees rotation around the given anchor..rotateByAnchor(90, anychart.graphics.vector.Anchor.CENTER_TOP)
Rotation points are marked with red, initial position of shapes is marked with gray.

scale

If the scaling center is not set it defaults to (0, 0).
Left illustration shows default point scaling..scale(0.5, 0.5,)
Right illustration shows scaling with the scaling center set..scale(0.5, 0.5, x, y)
Scaling center is marked with red, initial state is marked with gray.

scaleByAnchor

If anchor is not set it defaults to anychart.graphics.vector.Anchor.CENTER.
Left illustration shows scaling with the default anchor..scaleByAnchor(0.5, 0.5)
Right illustration shows scaling with the anchor set..scaleByAnchor(0.5, 0.5, anychart.graphics.vector.Anchor.RIGHT_TOP)
Scaling center is marked with red, initial state is marked with gray.